Abstract
In an attempt to show that aphasics with apraxia of speech have characteristic articulatory patterns, two aphasics with apraxia of speech, and one subject with articulatory problems related to his sensory aphasia, underwent articulation testing. A quantitative measure of distance between error sound and target sound showed that the types of aphasics did not differ on distance, and apraxics could therefore not be said to be closer to the target sound than a sensory aphasic. However, the more severe the communication disorder, the higher was the distance score. A qualitative analysis of the data revealed that the apraxics had substitutions of phonemes as their major error, whereas in the subject without apraxia, substitutions were as prevalent as other errors such as reversals, omissions, augmentations. Aphasics with apraxia of speech may be said to show characteristic types of errors.
Highlights
To test whether aphasics with apraxia of speech are closer in distance to the target sound than are aphasics with articulation problems other than apraxia of speech, Ss were only compared on phonemes where both had made errors; Mr G and Mrs Μ were compared on 31 utterances, Mr G and Mrs Κ on 7, and Mrs Μ and Mrs Κ on 7 utterances
Luria feels that to consider the disorder of motor aphasia in relation to the motor disorder of apraxia is a progressive step and he uses the term of apraxia in connection with afferent motor aphasia
It did not appear that aphasics with apraxia of speech were closer in distance to the target sound than sensory aphasics, as suggested by Canter.4/These findings might have been the result of the more subtle analysis utilize'd in this study, i.e. a distinctive feature system
Summary
Theylare a distance of 1 apart on manner, as /f/ is + strident and /0/ - strident.[27] it was possible to quantitatively state the difference between error sound and target sound in the responses on the articulation tests. The number of errors made varied between Ss. To test whether aphasics with apraxia of speech are closer in distance to the target sound than are aphasics with articulation problems other than apraxia of speech (in this case a sensory aphasic, as diagnosed on the Boston Examination), Ss were only compared on phonemes where both had made errors; Mr G and Mrs Μ were compared on 31 utterances, Mr G and Mrs Κ on 7, and Mrs Μ and Mrs Κ on 7 utterances. In accordance with Hypothesis 2, all the data from the articulation testing were qualitatively assessed and occurrence of characteristics such as perseverations, reversals, word and sound substitutions, simplifications and augmentations were noted
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